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Diffstat (limited to 'ext/bigdecimal/sample/linear.rb')
-rw-r--r-- | ext/bigdecimal/sample/linear.rb | 74 |
1 files changed, 0 insertions, 74 deletions
diff --git a/ext/bigdecimal/sample/linear.rb b/ext/bigdecimal/sample/linear.rb deleted file mode 100644 index 516c2473be..0000000000 --- a/ext/bigdecimal/sample/linear.rb +++ /dev/null @@ -1,74 +0,0 @@ -#!/usr/local/bin/ruby -# frozen_string_literal: false - -# -# linear.rb -# -# Solves linear equation system(A*x = b) by LU decomposition method. -# where A is a coefficient matrix,x is an answer vector,b is a constant vector. -# -# USAGE: -# ruby linear.rb [input file solved] -# - -# :stopdoc: -require "bigdecimal" -require "bigdecimal/ludcmp" - -# -# NOTE: -# Change following BigDecimal.limit() if needed. -BigDecimal.limit(100) -# - -include LUSolve -def rd_order(na) - printf("Number of equations ?") if(na <= 0) - n = ARGF.gets().to_i -end - -na = ARGV.size -zero = BigDecimal("0.0") -one = BigDecimal("1.0") - -while (n=rd_order(na))>0 - a = [] - as= [] - b = [] - if na <= 0 - # Read data from console. - printf("\nEnter coefficient matrix element A[i,j]\n") - for i in 0...n do - for j in 0...n do - printf("A[%d,%d]? ",i,j); s = ARGF.gets - a << BigDecimal(s) - as << BigDecimal(s) - end - printf("Contatant vector element b[%d] ? ",i) - b << BigDecimal(ARGF.gets) - end - else - # Read data from specified file. - printf("Coefficient matrix and constant vector.\n") - for i in 0...n do - s = ARGF.gets - printf("%d) %s",i,s) - s = s.split - for j in 0...n do - a << BigDecimal(s[j]) - as << BigDecimal(s[j]) - end - b << BigDecimal(s[n]) - end - end - x = lusolve(a,b,ludecomp(a,n,zero,one),zero) - printf("Answer(x[i] & (A*x-b)[i]) follows\n") - for i in 0...n do - printf("x[%d]=%s ",i,x[i].to_s) - s = zero - for j in 0...n do - s = s + as[i*n+j]*x[j] - end - printf(" & %s\n",(s-b[i]).to_s) - end -end |